Why this game is intriguing:The last time these teams met, the enduring imagine was of Chargers quarterback Philip Rivers kneeling on the sideline, waving coach Norv Turner's instructions off after throwing a game-changing pick. It was ugly. In the first sign that San Diego was meltdown city, the Chargers coughed up a 24-0 lead in a flurry of miscues, poor defensive play and turnovers. Since then, San Diego has lost three of four, while Peyton Manning's Broncos have emerged as one of the NFL's most electric teams. The Broncos, it seems, are off and running to a cushy seed and the playoffs. A loss would be a bump in the road for them. But if desperate San Diego can somehow win, that would be the kind of victory that could turn around its season. A stellar Chargers showing would exorcise some demons.